Guide Questions:
1. Do you see the coin before the water is poured into the glass? What about after? Explain your answer.
2. Why did the coin seem to vanish in the glass? Explain your answer.
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Guide Questions:
1. Do you see the coin before the water is poured into the glass? What about after? Explain your answer.
2. Why did the coin seem to vanish in the glass? Explain your answer.
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Answer:
1.When the cup is filled with water, the penny disappears. This happens because of refraction. When light bounces off of an object, it reaches our eyes and we see the object. As light travels through the sides of the glass and the water, it's refracted and never reaches our eyes, which makes the penny seems to disappear.
2.When 100% of the light reflects in this way it's called total internal reflection. With the glass filled all the way to the top, none of the light from the coin at the bottom can escape through the sides. It's trapped. It can never reach your eyes and so the coin seems to vanish.
Explanation:
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